compare_complex_doubles.c
Go to the documentation of this file.
00001 /*******************************************************************************
00002   Copyright (c) 2010, Intel Corp.
00003   All rights reserved.
00004 
00005   Redistribution and use in source and binary forms, with or without
00006   modification, are permitted provided that the following conditions are met:
00007 
00008     * Redistributions of source code must retain the above copyright notice,
00009       this list of conditions and the following disclaimer.
00010     * Redistributions in binary form must reproduce the above copyright
00011       notice, this list of conditions and the following disclaimer in the
00012       documentation and/or other materials provided with the distribution.
00013     * Neither the name of Intel Corporation nor the names of its contributors
00014       may be used to endorse or promote products derived from this software
00015       without specific prior written permission.
00016 
00017   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00018   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00019   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00020   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
00021   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
00022   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
00023   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
00024   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
00025   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
00026   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
00027   THE POSSIBILITY OF SUCH DAMAGE.
00028 ********************************************************************************
00029 *   Contents: auxiliary test routine for C interface to LAPACK
00030 *   Author: Intel Corporation
00031 *   Created in December, 2009
00032 *
00033 *   Purpose
00034 *
00035 *   This routine tests two complex numbers for identity with a tolerance.
00036 *******************************************************************************/
00037 
00038 #include "test_utils.h"
00039 
00040 int compare_complex_doubles( lapack_complex_double a,
00041                              lapack_complex_double b ) {
00042     double a_re = *((double*)&a);
00043     double a_im = *(((double*)&a)+1);
00044     double b_re = *((double*)&b);
00045     double b_im = *(((double*)&b)+1);
00046     double diff_re = ( a_re > b_re ) ? ( a_re - b_re ) : ( b_re - a_re );
00047     double diff_im = ( a_im > b_im ) ? ( a_im - b_im ) : ( b_im - a_im );
00048     return ( diff_re < DP_TOLERANCE &&
00049              diff_im < DP_TOLERANCE ) ? 0 : 1;
00050 }


swiftnav
Author(s):
autogenerated on Sat Jun 8 2019 18:55:32